Improved machine for grooving stove-pipe



NJETERS. PHOTO-LITHOGRAPNER, WASHINGTON. D C.

PATENT OFFICE.

CHARLES BIGELOVV, OF HASTINGS, MINNESOTA.

nIMPROVE-1D MACHINE FOR GROOVING STOVE-PIPE.

Specification forming part of Letters Patent No. 17,48?, datcrlJu1ic9,1S5/'.

Toall whom it may concern:

Be it known that l, CHARLES BIGELow, of

Hastings, in the county of Dakota, in the State of Minnesota, have invcntevda new and iniproved machine for grooving and closing the joints or scams of stove and other shcet-metal pipes; and I do hereby declare that the following is a full, clear, and eXact description of the saine, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side view of my improvements. Fig. 2 is a transverse vertical section of the same, c x in Fig. l showing the plane of section. Fig. 3 is a plan or top view of the same. Fig. it is a transverse section of a portion ofa pipe, showing the joint before being closed.

Similar letters of reference indicate corresponding parts in each of the several figures.

My invention consists in the employment or use of a roller having a grooved or concave and also a iiat surface, said roller being fitted within a reciprocating bar, and so arranged that it may be moved or shifted laterally, and the grooved and hat surfaces of the roller made to pass successively over the joint or seam of the pipe, the roller being shifted or moved automatically at each end of its stroke or movement, the grooved surface of the roller passing over the seam while it is moving in one direction, and the ilat surface passing over said seam when the roller is moving in the opposite direction. The pipe is placed upon a hinged bar, and the whole is so arranged and operated that the joints or seams are closed in an expeditious and perfect manner and with the greatest facility.

To enable those skilled in the art to make and use my inve ntion, I will proceed to describe it.

A A represent two uprights, which may be of cast-iron. The upper parts of these up rights are formed of two vertical plates, a a, to which parallel horizontal bars b b are attached, said bars connecting the two uprights.

On one of the uprights, A, a horizontal projection, c, is formed, and to the other upright, A, a horizontal bar, B, is attached by a joint. The upper surfaces of the bar B and projection c are in the same plane or on the same level, and the outer end of the bar B is connected to the end of the projection c by a pin,

d, which passes into the under side of the bar B, and is retained therein by a spring, e, to which the pin d is att-ached. The ends ofthe har B and projection c are soforr'ned that they will, when connected, overlap each other, as shown clearly in Fig. l.

In the projection c a lever, f, is fitted. The lower end of this lever bears against the spring e, and the upper end projects a trie above the upper surface of the projection c.

C represents a bar, which has a rack, g, formed on its under side'. The bar C is fitted between the plates a a, and a roller, D, is fit ted in one end of t-he bar C, said roller being placed loosely on a rod, h,which passes trans- Versely through the bar G. The roller D is fitted in a mortise in the bar sufficiently wide to allow the roller a certain degree of lateral movement. j

E represents a yoke, one end of which is pivoted to the bar C at t'. The yoke E is fitted over the roller D. The opposite end of this yoke has the lower end of a vertical lever, F, fitted in it. This lever works on a fulcrum-pin, j, which is in an upright, G, attached to the end of the bar C. The upper end of the lever F has a cross-bar, k, attached to it, and the back part of the upper end of said lever F is beveled and of triangular forni, as shown atl in Fig. 3. Throughthe upper end of the upright G a pin, m, passes. |The outer end of this pin is attached to a spring, n, which is secured to the outer side of the upright G. j

Hrepresents a bar,which has friction-rollers o o placed in it. One end of this bar rests upon a nut, p, on the fulcrum-pintof the yoke E. The opposite end rests upon supports g, attached to the end of the bar C. The periphery of the roller D ,has a grooved or concave surface, r, and a ilat surface, s, as shown in Figs. 2 and 3. The upper end of the upright G has a pin, t, passing transversely through it, and two oblique blocks or ledges, u a', are placed on the bars b b-a ledge on each bar. These are both shown in Fig. 3.

ted thereon, into which wheel a driving-pinion, bx, gears. i

The operation is as follows: The pipe 1s I represents apinion (shown by dotted lines) formed in the usual way, the sheet-metal plate sition to pass over the joint or seam in consebeing bent in cylindrical form, and the edges of the plate bent and locked one within the other, as usual, and as shown in Fig. 4. The pipe (designated by .l and shown in red) is placed upon the bar B, and the roller D is moved to the outer end of the bar B. The bar C is then moved in the direction indicated by arrow l, the groove o in the periphery of the roller passing over the joint or seam of the pipe, as shown in Fig. 2. rlhe grooved surface of' of the roller D grooves or closes the edges ofthe seam or joint, and when the roller has reached the extent of movement in the direction of the arrow l the end of the bar 7c will strike against the ledge u, and the lever F will be actuated and the yoke E moved so as to shift the position of the roller D, and the dat surface s of the roller will be brought directly over the seam or joint ofthe pipe.

The motion of the bar C is then reversed, as indicated by the arrow 2, andthe dat portion s of the roller will compress the joint or seam and efectually close it. Vhen the roller D reaches the extentof the movement indicated by the arrow 2, a projection, sx, on the bar C strikes the lever j', and the pin d will be depressed and withdrawn from the bar B, said bar being thrown outward by a spring, tx, so'

quence of the cross-bar 7s striking against the ledge u. The friction-rollers o o bear against the under sufraces of the bars b b, and by raising or lowering the nut p the requisite pressure'of the roller D upon the seam or joint may be obtained. The pin m prevents the yoke E, and consequently the roller D, from being casually moved.

Having thus described my invention, ,what I claim as new, and desire to secure by Letters Patent, is-d 1. The roller D, having its periphery or face formed of a grooved or concave surface anda flat surface, the roller being placed within a reciprocating bar, C, and within a yoke, E, arranged and actuated by the lever F and ledges u u, as shown, whereby the roller is shifted or moved automatically at the ends of its strokes or movements and made to groove and close the joints or seams of the pipes at one operation.

2. The bar B, when jointed to the upright A and secured to the projection c by the pin d, as shown, and used in connection with the lever f and spring tx, as described, so that said bar may be thrown out automatically from the .projection c, for the purpose of allowing" the finished pipe to be removed readily therefrom and another placed thereon.

' CHARLES BIGELOV.

fitnesses MICHAEL McHUGH, MoNTcALM J. STrMsoN. 

